Filter interconnect using a correlated magnet torque design

ABSTRACT

A filtration system interconnection structure having manifold with a rotatable manifold magnet of correlated magnets, a shroud with alignment tracks, an actuating valve for water ingress, and a filter cartridge having a rotatable filter magnet of correlated magnets, where the manifold magnet and the filter magnet are in magnetic communication with one another when the filter cartridge is inserted with the shroud, and are at least partially rotatably compatible, where the manifold magnet rotates with the filter magnet until the manifold magnet experiences a rotational stop beyond a predetermined rotation of the filter magnet, thus allowing the filter magnet to shift polarity with respect to the manifold magnet and present a repulsion force for removal of the filter cartridge from the shroud.

BACKGROUND OF THE INVENTION 1. Field of the Invention

The present invention relates to the interconnection scheme between afilter cartridge and its corresponding manifold. The invention utilizesa correlated magnetism design that encompasses correlated magnets. Thefunction of the correlated magnets in this application is twofold.First, a valve is actuated through rotation of the filter cartridge intothe manifold; and second, a repulsion force is introduced upon filtercartridge rotation to assist in the filter cartridge removal from themanifold.

2. Description of Related Art

Correlated magnet designs were introduced in U.S. Pat. No. 7,800,471issued to Correlated Magnetics Research, LLC on Sep. 21, 2010, titled“FIELD EMISSION SYSTEM AND METHOD” (the “'471 patent”). This patentdescribes field emission structures having electric or magnetic fieldsources. The magnitudes, polarities, and positions of the magnetic orelectric field sources are configured to have desirable correlationproperties, which are in accordance with a predetermined code. Thecorrelation properties correspond to a force function where spatialforces correspond to relative alignment, separation distance, and aspatial force function.

In U.S. Pat. No. 7,817,006, issued to Cedar Ridge Research LLC on Oct.19, 2010, titled “APPARATUS AND METHODS RELATING TO PRECISIONATTACHMENTS BETWEEN FIRST AND SECOND COMPONENTS (a related patent to the'471 patent), an attachment scheme between first and second componentsis taught. Generally, a first component includes a first field emissionstructure and the second component includes a second field emissionstructure, wherein each field emission structure includes multiplemagnetic field emission sources (magnetic array) having positions andpolarities relating to a predefined spatial force function thatcorresponds to a predetermined alignment of the field emissionstructures. The components are adapted to be attached to each other whenthe first field emission structure is in proximity of the second fieldemission structure.

When correlated magnets are brought into alignment with complementary ormirror image counterparts, the various magnetic field emission sourcesthat make up each correlated magnet will align causing a peak spatialattraction force, while a misalignment will cause the various magneticfield emission sources to substantially cancel each other out. Thespatial forces (attraction, repulsion) have a magnitude that is afunction of the relative alignment of the two magnetic field emissionstructures, the magnetic field strengths, and their various polarities.

It is possible for the polarity of individual magnet sources to bevaried in accordance with a code without requiring a holding mechanismto prevent magnetic forces from “flipping” a magnet. As an illustriousexample of this magnetic action, an apparatus 1000 of the prior art isdepicted in FIG. 1 . Apparatus 1000 includes a first component 1002 anda second component 1012. The first component includes a first fieldemission structure 1004 comprising multiple field emission sources 1006.The second component includes a second field emission structure 1014comprising multiple field emission sources 1016. The first and secondcomponents are adapted to attach to one another when the first fieldemission structure 1004 is in proximity of the second field emissionstructure 1014, that is, when they are in a predetermined alignment withrespect to one another.

The first field emission structure 1004 may be configured to interactwith the second field emission structure 1014 such that the secondcomponent 1012 can be aligned to become attached (attracted) to thefirst component 1002 or misaligned to become removed (repulsed) from thefirst component. The first component 1002 can be released from thesecond component 1012 when their respective first and second fieldemission structures 1004 and 1014 are moved relative to one another tobecome misaligned.

Generally, the precision within which two or more field emissionstructures tend to align increases as the number N of different fieldemission sources in each field emission structure increases, for a givensurface area A. In other words, alignment precision may be increased byincreasing the number N of field emission sources forming two fieldemission structures. More specifically, alignment precision may beincreased by increasing the number N of field emission sources includedwithin a given surface area A.

In U.S. Pat. No. 7,893,803 issued to Cedar Ridge Research on Feb. 22,2011, titled “CORRELATED MAGNETIC COUPLING DEVICE AND METHOD FOR USINGTHE CORRELATED COUPLING DEVICE,” a compressed gas system componentcoupling device is taught that uses the correlated magnet attachmentscheme discussed above.

An illustrious example of this coupling device is shown in FIG. 2 ,which depicts a quick connect air hose coupling 1200 having a femaleelement 1202 and a male element 1204.

The female element 1202 includes a first magnetic field emissionstructure 1218. The male element 1204 includes a second magnetic fieldemission structure 1222. Both magnetic field emission structures aregenerally planar and are in accordance with the same code but are amirror image of one another. The operable coupling and sealing of theconnector components 1202, 1204 is accomplished with sufficient force tofacilitate a substantially airtight seal therebetween.

The removal or separation of the male element 1204 from the femaleelement 1202 is accomplished by separating the attached first and secondfield emission structures 1218 and 1222. The male element is releasedwhen the male element is rotated with respect to the female element,which in turn misaligns the first and second magnetic field emissionstructures.

A description of the precision alignments of polymagnets is furtherdescribed herein. As is well known, in conventional magnets the holdingforce is generally high even when the magnets are off center. This meansthey are likely going to attract in undesirable places, and they willgenerally have a high frictional force holding them in that position.

A polymagnet pair of the same nature as the conventional magnetdiscussed above, is designed and engineered to incorporate an alignmentpattern, and will exhibit a strong peak force (the holding force) whenthe polymagnets are in alignment. When the magnets are moved out ofalignment, the force drops off rapidly. Furthermore, at a predeterminedoffset, these magnets will actually start to repel. In a system designedwith these magnets, the components will feel like they are floatinguntil they are more closely aligned, at which point they will attach.

In this manner, there is very little positive holding force outside theregion where there is a strong alignment force. This removes thepossibility of attachment when the components are misaligned.

Baker correlation codes are utilized to form the unique sequences of +1sand −1s in a function such that the two functions resonate strongly whenaligned, and when shifted the resonance diminishes dramatically.

The present invention adapts the correlated (poly)magnet technologydescribed above to an interconnection structure for a filter cartridgeand a corresponding manifold.

SUMMARY OF THE INVENTION

Bearing in mind the problems and deficiencies of the prior art, it istherefore an object of the present invention to provide a “torque/align”model for a filter cartridge and manifold structure, which allows forone magnet on the filter cartridge to apply a torque to a non-contactingcorresponding magnet on the manifold when they are in phase.

It is another object of the present invention to provide a filtrationsystem incorporating correlated magnets for attachment, detachment, andprimary function activation.

A further object of the invention is to provide a filtration system(manifold and cartridge) in magnetic communication where the magnetsprovide attraction and repulsion upon predetermined rotation positionsrelative to one another.

The above and other objects, which will be apparent to those skilled inthe art, are achieved in the present invention which is directed to afiltration system comprising: a filter manifold having a rotatablemanifold magnet, a mechanical stop in proximity to the manifold magnet,a valve, and a shroud; and a filter cartridge having a housing body anda stem extending from a top portion of the housing body, and a filtermagnet located on or within the stem; wherein the manifold magnet isattached to or housed within a rotatable structure having an extensionor tab, such that the tab is in mechanical communication with themanifold mechanical stop at predetermined points of rotation of themanifold magnet, wherein the manifold magnet and the filter magnet areinterconnected via magnetic communication with one another uponinsertion of the filter cartridge into the shroud, and upon rotation ofthe filter cartridge, the manifold magnet rotates and is capable ofactuating the valve to perform a primary function, such as turning ON orOFF fluid to the filter cartridge.

The manifold magnet is an array of correlated magnets having a firstfield emission structure.

The filter magnet is an array of correlated magnets having a secondfield emission structure.

The shroud includes a plurality of alignment tracks for receiving afilter boss that extends radially outwards from the filter cartridgehousing, the alignment tracks governing the position of the filtercartridge upon rotation.

The manifold magnet includes a sheath extending over a surface of themanifold magnet, such that the manifold magnet is separated from thefilter magnet by a physical barrier, the sheath in proximity to thefilter magnet when the filter magnet is inserted within the shroud.

The filter magnet polarity is aligned with the manifold magnet polarityan attraction force is realized between the filter magnet and themanifold magnet when the filter cartridge is initially rotated withinthe shroud.

The manifold magnet rotates with the filter magnet as the filter magnetrotates through approximately 90° in a first direction from an initialinsertion position within the shroud.

The manifold magnet is prohibited from rotating with the filter magnetwhen the filter magnet rotates approximately 90° in a second directionfrom an initial insertion position within the shroud, such that thefilter magnet polarity is no longer aligned with the manifold magnetpolarity and a repulsion force is realized between the magnets to assistin filter cartridge extraction.

After rotation the filter cartridge is slidably removable from themanifold and shroud, and removal is assisted by the repulsion force.

Prohibition of rotation of the manifold magnet is achieved by having thetab abut the mechanical stop, such that the manifold magnet can nolonger rotate with the filter magnet for rotation beyond the mechanicalstop when the filter cartridge continues to be rotated.

The manifold magnet and the filter magnet each have respective fieldemission structures, wherein the manifold magnet field emissionstructure is configured to interact with the filter magnet fieldemission structure such that the manifold magnet and the filter magnetcan be aligned to become attached (attracted) to one another ormisaligned to become removed (repulsed) from one another, wherein themanifold magnet can be released from the filter magnet when theirrespective field emission structures are moved relative to one anotherto become misaligned.

In a second aspect, the present invention is directed to a manifold fora filtration system comprising: a rotatable manifold magnet comprisingan array of correlated magnets; a valve for turning fluid ingress to themanifold ON or OFF; and a shroud having a plurality of predeterminedalignment tracks on an inside surface for receiving a filter bossextending from a filter cartridge, such that the filter cartridge isguided upon insertion and extraction from the shroud by the alignmenttracks.

The manifold magnet is supported on a rotatable structure, rotatablerelative to the manifold.

In a third aspect, the present invention is directed to a filtercartridge comprising: a housing body, the filter housing body having aside surface, and top surface with a stem extending therefrom, and afilter boss extending radially outwards from the side surface; the stemincluding ingress and egress ports for fluid flow, and a filter magnethaving a plurality of correlated magnets for magnetic interaction withcomplementary magnets on a manifold, the filter magnet positioned on atop surface of the stem or within the stem.

In a fourth aspect, the present invention is directed to a filtercartridge comprising: a housing body and a stem extending from a topportion of the housing body, the stem including a filter magnet having asurface in close proximity to a manifold magnet when the filtercartridge is inserted within the manifold, the housing body including afilter boss extending radially outwards from a housing outer surface;the filter boss aligned within an alignment track of a manifold shroudwhen the filter cartridge is inserted therein; the filter magnet havinga plurality of correlated magnets forming a field emission structure inmagnetic communication with the manifold magnet when the filtercartridge is fully inserted within the shroud.

In a fifth aspect, the present invention is directed to a filtrationsystem comprising: a filter manifold having a manifold magnet, a switchvalve, and a shroud; and a filter cartridge having housing body, a stemextending from a top portion of the housing body, a filter bossextending radially from the housing body, and a filter magnet located onor within the stem; wherein the manifold magnet and the filter magnetare interconnected via magnetic communication with one another uponrotatable insertion of the filter cartridge into the shroud, and uponrotation of the filter cartridge, the manifold magnet rotates and iscapable of actuating the switch valve to perform a primary function,such as turning ON or OFF fluid to the filter cartridge.

BRIEF DESCRIPTION OF THE DRAWINGS

The features of the invention believed to be novel and the elementscharacteristic of the invention are set forth with particularity in theappended claims. The figures are for illustration purposes only and arenot drawn to scale. The invention itself, however, both as toorganization and method of operation, may best be understood byreference to the detailed description which follows taken in conjunctionwith the accompanying drawings in which:

FIG. 1 depicts an apparatus of the prior art having two componentsmagnetically attached to one another;

FIG. 2 depicts a quick connect air hose coupling of the prior artshowing placement of correlated magnets for attachment;

FIG. 3A depicts a cross-section of a portion of a manifold and a shroudor housing;

FIG. 3B depicts a shroud having alignment railings to steer a filterboss on the filter cartridge;

FIG. 4A depicts a cross-sectional view of a portion of the manifold ofthe present invention and the filter cartridge within the shroud, in aconnected or INSTALLED position or state;

FIG. 4B depicts the INSTALLATION position of filter cartridge, when thefilter cartridge is inserted within the shroud with the filter bossbeing aligned in a portion of the shroud's alignment rail;

FIG. 4C depicts the polarity positions for the manifold magnet andfilter magnet in the attracted or attached position;

FIG. 5A depicts a new alignment position of the rotated filter cartridgeusing a position indicator ⊗ on each magnet;

FIG. 5B depicts the position of the filter boss when the filtercartridge and manifold place the system in the ON state;

FIG. 5C depicts the attraction polarities of each magnet when the filterboss is at the end position of the alignment rail;

FIG. 6A depicts position indicators ⊗ out of phase with one anothercaused by the rotation of filter cartridge when filter boss is at an endpoint of the alignment rail for cartridge removal;

FIG. 6B depicts the filter boss at the end point of the alignment railfor EJECTION of the filter cartridge;

FIG. 6C depicts the magnet orientation at the EJECTION position;

FIG. 7 depicts a top portion of filter cartridge showing a spool valve 4within the stem portion of the cartridge;

FIG. 8 depicts a second embodiment of a filtration system utilizingcorrelated magnets on a filter cartridge stem and on a manifold, with afilter boss following a predetermined alignment path on the manifoldshroud during insertion and extraction;

FIG. 9 depicts an alignment path thread of the manifold shroud with afilter boss located at an upper leg portion of the thread;

FIG. 10 depicts an alignment path thread of the manifold shroud with afilter boss located at a lower leg portion of the thread; and

FIG. 11 depicts a third embodiment of a filtration system utilizingcorrelated magnets on a filter cartridge stem and on a manifold, with alid rotatably connected to the manifold, the lid having extended lugsfor following a threaded path on a manifold capture structure, where thethreaded path represents a predetermined alignment path on the manifoldcapture structure insertion and extraction.

DESCRIPTION OF THE PREFERRED EMBODIMENT(S)

In describing the preferred embodiment of the present invention,reference will be made herein to FIGS. 1-11 of the drawings in whichlike numerals refer to like features of the invention.

Correlated magnets contain areas of alternating poles. These codes ofalternating poles can concentrate and/or shape magnetic fields to givematching pairs of magnets unique properties. The proposed designspecifically uses a “torque/align” model, which allows for one magnet toapply a torque to a non-contacting corresponding magnet when they are inphase.

When the torque exceeds a maximum value either by application ofexcessive force or obstruction of the rotation of the connecting pair,the connecting pair components (each having a respective magnet) willhave their magnets out of phase, and thus initiate a repulsion forceagainst one another. The proposed design utilizes this property toattach a filter to a manifold, open and close a non-contacting valve(e.g., spool valve or other valve design) through rotation, and aid infilter removal by assisting in the ejection of the filter.

These features are accomplished by having at least a pair of magnets,preferably correlated magnets, oriented parallel to one another on eachcomponent of the connecting pair, wherein a first magnet is located onthe top of a filter and a complementary magnet is located on themanifold designed to secure the filter into position. In at least oneembodiment, a thin layer of material is introduced, physicallyseparating the two magnets so they cannot have physical contactingsurfaces, but they can still magnetically attract or repulse oneanother.

The function of the magnet located on the manifold is to assist inactuating a valve preferably through rotation (e.g., spool valve, camand poppet valve, and other valve types). The manifold magnet is free torotate, but restricted in rotational range. Preferably a ninety-degree(90°) rotation is used to correspond to the open and closed positions ofthe valve; however, other ranges of rotation are possible and notprohibited. The filter cartridge magnet is also free to rotate with therotating filter cartridge, and designed in an embodiment that ensuresthe filter cartridge will rotate further than the manifold magnet.

By way of example, when the manifold magnet is rotatable up to 90°, thefilter cartridge magnet is designed to freely rotate to one hundredeighty degrees (180°). The filter cartridge magnet is designed toperform two functions. The first function is to apply torque to themanifold magnet (that is, bring the manifold magnet along in rotation)in order to actuate a valve. The second function is to work inconjunction with a mechanical stop to force the magnet pair out of phaseto aid in filter removal.

During initial installation, the filter is guided by an alignment railand boss system so that the correlated magnet on the filter top surface(filter magnet) and the corresponding correlated magnet on the manifold(manifold magnet) are aligned (in-phase forming an attraction force) butnot in contact. The correlated magnet in the manifold actuates a valvewhen rotated 90°, said activation may be physically, electrically, ormechanically initiated.

When the filter is rotated the manifold magnet rotates along with itthrough attraction forces, and actuates the valve. Both the filter andmanifold magnets are prevented from rotating past the point at which thevalve is opened. To remove the filter, the filter is rotated in thecounter-direction, bringing the manifold magnet along with it, at leastpartially along the rotational path, which causes the valve in themanifold to close. The magnet in the manifold is prevented from rotatingpast the closed position but the filter is free to “over-rotate”, or inthe exemplary embodiment, rotate an additional 90°. The “over-rotation”of the filter forces the magnets out of phase and produces a netrepulsive force between the filter and the manifold which then aids infilter removal.

FIG. 3A depicts a cross-section of a portion of a manifold 12 with ashroud or housing 14. Manifold magnet 16 is situated at the top end ofshroud 14. A separator 18, such as a plastic sheath, is attached belowmanifold magnet 16, which serves to form a gap between manifold magnet16 and filter magnet 34 (not shown) when the filter cartridge 30 isinserted within shroud 14 and connected to manifold 12. This providesthe physical separation between the manifold magnetic interconnectionwith the filter cartridge.

Manifold magnet 16 is rotatable about the center axis 22; however, forreasons discussed below, the rotation is purposely limited to bedifferent than, and preferably less than, the rotational range of therotatable filter magnet 34. A mechanical stop 24 on the manifold housinglimits the rotation of the rotatable manifold magnet 16. In oneembodiment, mechanical stop 24 limits and restricts the rotation ofmanifold magnet 16 to ninety degrees (90°). Other rotationalrestrictions are possible based on the placement of the mechanical stop,and the present invention is not limited to a ninety-degree restriction.

Shroud 14 includes alignment railings 20 a-20 d to steer a filter boss32 which is shown on filter cartridge 30 of FIG. 3B. Alignment railingsare preferably grooves embedded within shroud 14; however, other formsof alignment are possible and not precluded from the present design. Forexample, the alignment rails may form slots for a tongue-and-grooveattachment to the filter cartridge boss, or form extended linearsegments to receive a filter cartridge boss having a receiving slot.

Referring to FIG. 3B, which is a partial cross-sectional view of thefilter cartridge 30, filter cartridge 30 includes a filter magnet 34 atthe cartridge top end that is capable of rotation with respect to theaxis of the filter cartridge. In this manner, the magnet may rotateconcurrently with the cartridge rotation relative to the filtercartridge axis.

Alignment rail 20 c on the manifold shroud 14 represents the “entrytrack” for filter cartridge 30 by receiving filter boss 32 when filtercartridge 30 is inserted within shroud 14. In this illustrativeembodiment, filter boss 32 is an extended protrusion that extends in theradial direction outwards from the filter cartridge axial center.

Alignment rail 20 d guides the filter boss 32 through rotation about theaxial center of the filter cartridge 30. Alignment rail 20 d directs therotating position for filter boss 32 when filter cartridge 30 as thecartridge is fully inserted within shroud 14 and rotated such thatfilter boss 32 travels in alignment rail 20 d to its end as its pathpartially circumvents the shroud's inner cavity. As will be shown infurther detail below, this end rotational position of filter boss 32within alignment rail 20 d places the filter cartridge 30 in positionfor filtering operation.

FIG. 4A depicts a cross-sectional view of a portion of a manifold 12 andfilter cartridge 30 (within shroud 14) in a connected or INSTALLEDposition or state, where the manifold 12, specifically, manifold magnet16, is magnetically attached and attracted to filter magnet 34. Manifoldmagnet 16 is shown above and in alignment with filter magnet 34. Forexemplary purposes, the alignment is depicted by the position indicator⊗ on each magnet. The magnets are physically separated by a sheath orlayer of material 18, such as a plastic sheet, although other materialtypes are certainly possible and not prohibited by the current design.The material of sheath 18 must be capable of allowing for magneticattraction and repulsion forces to be transmitted therethrough, butallow for sliding rotation of the magnet surfaces.

Each magnet is a correlated magnet having a field emission structure.The manifold magnet field emission structure is configured to interactwith the filter magnet field emission structure such that the magnetscan be aligned to become attached (attracted) to one another ormisaligned to become removed (repulsed) from one another. The manifoldmagnet can be released from the filter magnet when their respectivefield emission structures are moved relative to one another to becomemisaligned.

This INSTALLATION position of filter cartridge 30 is achieved byinserting filter cartridge 30 within shroud 14 with filter boss 32aligned in alignment rail 20 c, as shown in FIG. 4B traversing to thetopmost position in alignment rail 20 c, and stopping at the top edge ofalignment rail 20 d. When in this position, filter cartridge magnet 34and manifold magnet 16 share an attraction force “F” (depicted in FIG.4A), which attaches the filter cartridge to the manifold.

FIG. 4B depicts a perspective view of the position of filter boss 32within the alignment rail 20 on shroud 14 when filter cartridge 30 is inthe process of being placed in the INSTALLED position.

Filter cartridge 30 is first inserted within the entry rail 20 c ofshroud 14 until it reaches the top most portion of the alignment rail.At this point the manifold magnet 16 and filter magnet 34 are orientedfor full attraction. That is, the correlated magnets that form themanifold and filter magnets are in their respective, opposite polaritiesfor maximum attraction force. FIG. 4C depicts the polarity positions forthe manifold magnet 16 and filter magnet 34 in the attracted or attachedposition. The positive polarities of the manifold magnet, as shown in abottom side view, are aligned with the negative polarities of the filtermagnet, as shown in a top side view, putting the magnets “in-phase”. Inthis position, manifold magnet 16, although now in attraction force withthe filter cartridge magnet 34, has not yet been rotated, and as such, avalve (not shown) that would otherwise be actuated upon the manifoldmagnet's rotation remains in its OFF state.

As depicted in FIG. 4C, manifold magnet 16 is fixably attached to arotatable structure, such as a disc 26, having a protrusion or tab 28that moves with the rotation of the magnet. Tab 28 is designed to abutmechanical stop 24 in order to limit the range of rotation of manifoldmagnet 16. As shown in FIGS. 4B & 4C, when the filter cartridge 30 andfilter boss 32 are inserted within alignment rail 20 c, the magnets arein-phase, and mechanical stop 24 abuts, and is in contact with, tab 28.

Once filter cartridge 30 is installed within shroud 14, and filter boss32 is located at the topmost portion of alignment rail 20 d, thecartridge is then rotated such that filter boss 32 slidably extends toone end of alignment rail 20 d. Since manifold magnet 16 and filtermagnet 34 are magnetically aligned in their “attracted” state, whenfilter cartridge 30 (and thus, filter magnet 34) is rotated, manifoldmagnet 16 on disc 26 is correspondingly rotated. This new alignmentposition is depicted by the position indicator ⊗ on each magnet (FIG.5A), showing “attraction” alignment when filter boss 32 is at the end ofalignment rail 20 d. FIG. 5B depicts the location of the filter boss 32within alignment rail 20 d at this point of rotation.

At this position point of the filter cartridge and filter manifold,respectively, resulting from the rotation of manifold magnet 16concurrent with the rotation of the filter cartridge magnet 34, a valveis actuated and the system is placed in an “ON” state, where typicallywater is allowed to flow into the filter cartridge. FIG. 5C depicts theattraction polarities of each magnet when the filter boss 32 is at theend position of alignment rail 20 d. The magnets remain in completeattraction mode as they are rotated concurrently and in unison. Tab 28of manifold disc 26 is rotated away from mechanical stop 24. In thisexemplary embodiment, tab 28 is ninety degrees (90°) away frommechanical stop 24. In other embodiments it is possible for theseparation between tab 28 and mechanical stop 24 to be at a greater (orlesser) rotational distance.

FIG. 6 depicts the interim status of the system when, from the ON state,it becomes necessary to replace and therefore eject filter cartridge 30.Filter cartridge 30 is rotated from an end most point of alignment rail20 d (FIG. 5B) back through the INSTALLED position (FIG. 4B) wherefilter boss 32 is in line with alignment rail 20 c. At this point, asdepicted in FIG. 6C, tab 28 abuts mechanical stop 24, which abutmentphysically prohibits any further rotation of manifold magnet 16 in thedirection of arrows 23. At this juncture of the filter cartridgerotation, manifold magnet 16 stays in the “INSTALLED” position, and canrotate no further (in the direction of arrows 23).

To eject filter cartridge 30, rotation is continued, moving filter boss32 slidably across shroud 14 to an opposite end point of alignment rail20 b. FIG. 6A depicts position indicators ⊗ out of phase with oneanother caused by the rotation of filter cartridge 30 when filter boss32 is at the end point of alignment rail 20 b.

FIG. 6B depicts filter boss 32 at the end point of alignment rail 20 b.

As depicted in FIGS. 6B & 6C, when the filter boss 32 is located at theend point of alignment rail 20 b, manifold magnet 16 remains in itsINSTALLED position, while filter magnet 34 continues to rotate ninetydegrees (90°) further from its INSTALLED position. This is caused by tab28 abutting mechanical stop 24 when the filter boss 32 rotates throughthe INSTALLED position on its way to the “EJECTION” position.

FIG. 6C depicts the magnet orientation at this EJECTION position. Themagnets are now out-of-phase with one another, and a resulting repulsionforce assists in removing filter cartridge 30 from shroud 14.

FIG. 7 depicts a top portion perspective view of filter cartridge 30.Filter magnet 34 is shown on the top surface. Filter magnet 34 may beembedded within the stem portion 36 of the cartridge or exposed on thestem surface. A spool valve 40 is depicted within the stem portion 36 ofthe cartridge. Spool valve 40 includes two independent, separatelylocated channels 40 a,b for water ingress and egress. Upon rotation offilter cartridge 30, the inlet/outlet ports 42 a,b of channels 40 a,b,respectively, direct water flow. When the system is in the ON state,water is directed to the filter cartridge from the manifold to a firstchannel (which for exemplary purposes will be referred to as channel 40a), then through filter media within the filter cartridge, andultimately exits through the second channel (e.g., 40 b). Thisembodiment is considered a single-stem side-loaded filter design sinceboth ingress and egress access ports are on a single filter cartridgestem and water enters and exits the stem radially inwards and outwards.Other valve configurations are possible, such as cam and poppet valves,and such valve configurations are not precluded from this design. Uponrotation in an opposite direction, the system is placed in an OFF statewhere channels 40 a,b, and their respective inlet/outlet ports 42 a,b,are not aligned with water ingress and/or egress ports on the manifold.As noted in FIG. 7 , O-rings 44 may be used to keep the channel ports 42a,b separate, and out of fluid communication with one another.

FIG. 8 depicts another embodiment of the present invention havingrespective correlated magnets at the stem of the filter cartridge and atthe base of the manifold 52, where the filter cartridge includes a boss66 for following a path in the manifold to facilitate insertion. In thisembodiment, cartridge 50 is rotatably inserted within manifold 52. Arotational direction is depicted by arrow A. Filter cartridge 50includes a correlated magnet 54 at the end of its stem 68, which isdesigned to be in magnetic communication with correlated magnet 56 ofmanifold 52. Ingress water flows in the direction of arrow 64 intoingress channel 58, such that when filter cartridge 50 is completelyinserted within the stem receiving portion 52 b of manifold 52, waterwill flow through channel 58 into filter cartridge 50. After filtration,water will then exit filter cartridge 50 into egress channel 60 in thedirection of arrow 62.

As depicted in FIG. 9 , boss 66 is designed to follow a thread or groove70 formed in manifold 52. Thread or groove 70 may be a spiral threadpath, or as depicted a Z-thread path for boss 66 to traverse. As shownin FIG. 9 , boss 66 is in the top portion of thread 70 and in thisconfiguration the filter cartridge stem 68 is not fully inserted withinstem receiving portion 52 b of manifold 52. Correlated magnets 54, 56are not aligned for either maximum attraction or maximum repulsion.

The alignment tracks are configured in a Z-shaped pattern such that thefilter cartridge upon insertable rotation rotates for a first portion ofan arc-turn with little or no movement in an insertion direction, thenmoves in the insertion direction within the shroud for a second portionof an arc-turn, and finally rotates for a third portion of an arc-turnwith little or no movement in the insertion direction.

As the filter cartridge 50 is rotated in the direction of arrow A, boss66 traverses down the threaded path 70 to the bottom of the path, asshown in FIG. 10 , and filter cartridge stem 68 is seated within stemreceiving portion 52 b of manifold 52. In this position, correlatedmagnets 54, 56 are ultimately aligned for either maximum attraction ormaximum repulsion, and magnet 56 is positioned to activate a switch 81either mechanically or magnetically. Such a switch is capable ofproviding a primary function to the filter system, such as turning onthe ingress water, activating an electronic circuit for parametricmeasurements, and/or providing a status indicator to the user, to name afew.

When magnets 54 and 56 are aligned, if they are situated for anattraction upon alignment, they will rotate together as boss 66traverses further down threaded path 70, or as shown, along the bottomstraight portion of thread 70. The subsequent rotation of the alignedmagnets together will place the manifold magnet 56 in communication withswitch 81 for switch activation.

In an alternative embodiment, as depicted in FIG. 11 , a filter cap 75having lugs 77 is shown rotatably inserted within a manifold capture 79.Manifold capture 79 may include a threaded groove, in a similar fashionas threaded path 70. Upon rotation of filter cap 75, filter cartridge 50and filter cartridge stem 68 are inserted within manifold cavity 52 auntil magnets 54 and 56 are aligned, in which case they may be capableof rotating together as the filter cartridge boss 66 further traversesdown threaded path 70.

While the present invention has been particularly described, inconjunction with a specific preferred embodiment, it is evident thatmany alternatives, modifications and variations will be apparent tothose skilled in the art in light of the foregoing description. It istherefore contemplated that the appended claims will embrace any suchalternatives, modifications and variations as falling within the truescope and spirit of the present invention.

Thus, having described the invention, what is claimed is:
 1. A filtercartridge comprising: a housing body having a side surface and topsurface with a stem extending therefrom, and a filter boss extendingradially outwards from said side surface; said stem including ingressand egress ports for fluid flow, and a filter magnet including a coded,correlated magnet having an array of field emission structures havingmultiple magnetic field emission sources for magnetic interaction withcomplementary magnets on a manifold, said filter magnet positioned on atop surface of said stem or within said stem adjacent said top surface;and filter media located within said housing body.
 2. The filtercartridge of claim 1 wherein said array includes magnetic field emissionsources forming a predetermined design such that upon alignment with acomplementary magnet causes a peak spatial attraction force.
 3. Thefilter cartridge of claim 1 wherein said stem covers said filter magnetthat allows for magnetic attraction and repulsion forces from saidfilter magnet to transmit therethrough, such that said filter magnet isseparated from external elements by a physical barrier.
 4. The filtercartridge of claim 1 including wherein said stem includes a spool valvehaving separately located channels for directing water ingress andegress to and from said filter media.
 5. The filter cartridge of claim 1wherein said stem is a side-loaded structure having water ingressentering radially inwards, and water egress exiting radially outwards.6. The filter cartridge of claim 1 wherein said filter boss is shaped tobe received within a receiving channel within a shroud of a manifold.